Overhead Lines
Overhead Lines - Related Videos
07:17
Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis
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Cited by 1 •
2022
In this study, we demonstrate how to evaluate the presence of fluid overload through bioelectrical impedance vectorial analysis (BIVA) and the impedance ratio measured using tetrapolar multi-frequency equipment in patients admitted to the emergency department. BIVA and impedance ratio are reliable and useful tools to predict poor outcomes.
08:12
Surgically Induced Cardiac Volume Overload by Aortic Regurgitation in Mouse
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Cited by 3 •
2022
This protocol presents a practical guide on the surgery for creation of aortic regurgitation (AR) in the mouse. Assessment of the AR mouse by echocardiography and invasive hemodynamic measurement recapitulates its clinically relevant characteristics of volume overload-induced eccentric hypertrophy, suggesting its promising application in the study of cardiac hypertrophy.
06:04
Establishment and Confirmation of a Postnatal Right Ventricular Volume Overload Mouse Model
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Cited by 6 •
2023
This protocol presents the establishment and confirmation of a postnatal right ventricular volume overload (VO) model in mice with abdominal arteriovenous fistula (AVF), which can be applied to investigate how VO contributes to postnatal heart development.
06:09
Adult and Pediatric Porcine Model of Acute Volume Overload
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Cited by 1 •
2024
The protocol here shows how continuous administration of crystalloids into the central veins of a euvolemic pig/piglet allows for the appropriate investigation of the physiological effects of acute volume overload.
05:23
Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
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Cited by 4 •
2017
We have outlined a method of continuous manual exchange transfusion for the treatment of sickle cell disease in patients. This safe protocol was designed to effectively limit iron overload in patients in need of chronic transfusions and can be used extensively without any special equipment.
FAQs
Alternating current travels through the conductors, while insulators and carefully maintained spacing separate energized parts from supporting structures and surrounding objects. These features reduce unwanted leakage and help limit electrical faults or accidental contact. Prescribed clearances provide a safety margin around the line, supporting dependable transmission or distribution as the conductors pass near people and nearby objects.
Mechanical and environmental loads are central to overhead line design. Wind and ice can impose forces on conductors and their supports, while temperature changes cause conductors to expand. Engineers must account for these effects so the line maintains structural integrity, spacing, and required clearances during operation. Doing so helps preserve reliable service rather than treating electrical capacity alone as the design goal.
When engineers compare Overhead Lines with underground cables, they weigh more than the transmission function. Routing constraints, visual impact, maintenance requirements, and exposure to severe weather can influence the choice. Overhead construction is described as practical and scalable, but those planning and operating considerations determine whether it is appropriate for a particular connection or service area.
Poles, towers, crossarms, and insulators perform complementary roles. The supporting structures hold the conductors above ground, crossarms help maintain their arrangement, and insulators provide electrical separation from the supports. Together with prescribed spacing and clearances, these components address both mechanical support and electrical isolation, allowing the line to carry power while limiting leakage, faults, and unsafe contact.
Planning considers the line’s intended connection, required clearances, supporting structures, and exposure to wind, ice, and temperature variation. Engineers also weigh routing, visual impact, maintenance needs, and the surrounding risk of contact with people or nearby objects. This combined assessment links electrical performance with structural demands and practical service considerations.
Overhead Lines can connect generating stations to substations, and they can extend from substations to industrial facilities or communities. This makes them relevant to both transmission across distances and distribution to users. Their scalability supports a range of connection needs, while the choice to use them still depends on route conditions, maintenance expectations, appearance, and severe-weather exposure.
Maintenance planning must account for the line’s exposure to severe weather and its continuing need for sound supports, insulation, spacing, and clearances. These conditions can affect reliable service and the practical effort required to keep the system operating. Engineers therefore consider maintenance needs alongside construction and routing decisions, rather than evaluating an overhead installation only by its initial function.